Home / 39,695.58-54,779.70-21,790.89

Finding the Fourth Proportional to 39,695.58, 54,779.70 and 21,790.89

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Solution

The fourth proportional to 39,695.58, 54,779.70 and 21,790.89 is: 30,071.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,695.58 : 54,779.70 = 21,790.89 : x
  2. Step 2: Convert to fraction form
    39,695.58/54,779.70 = 21,790.89/x
  3. Step 3: Cross multiply
    39,695.58x = 54,779.70 × 21,790.89
  4. Step 4: Simplify right side
    39,695.58x = 1,193,698,416.93
  5. Step 5: Solve for x
    x = 1,193,698,416.93/39,695.58
  6. Step 6: Final answer
    x = 30,071.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.